Taiwan Semiconductor Corporation P6KE27A

Overview

P6KE27A from Taiwan Semiconductor is a unidirectional 600W transient voltage suppressor (TVS) diode designed for primary overvoltage protection in DC power rails and signal lines. It features a nominal breakdown voltage of 27 V, clamps transients to ≤37.5 V at 16.8 A peak surge current, and maintains <1 μA reverse leakage above 23.1 V standoff voltage - deployed in automotive body control modules, industrial PLC I/O protection, and LED driver input stages.

For engineers reviewing the P6KE27A datasheet, P6KE27A pinout, P6KE27A application, or P6KE27A equivalent, key selection criteria include its DO-15 package compatibility, 25.7–28.4 V breakdown range at 1 mA, 37.5 V max clamping voltage under 10/1000 µs surge, and AEC-Q101 qualification for automotive-grade reliability.

Technical Context

The P6KE27A operates as a silicon avalanche diode with unidirectional polarity, leveraging controlled avalanche breakdown to shunt ESD and lightning-induced surges away from downstream circuitry. Its low dynamic impedance ensures rapid voltage clamping during fast transients, while the 10/1000 µs waveform rating reflects standardized surge immunity testing per IEC 61000-4-5.

Designed for surface-mount-compatible through-hole assembly, it uses a single-die DO-204AC (DO-15) package with pure tin-plated leads compliant with J-STD-002 solderability and JESD201 Class 2 whisker resistance. Junction temperature range spans −55 °C to +175 °C, supporting operation in under-hood automotive environments.

Key Specifications

Pinout & Package

Package: DO-204AC (DO-15), axial leaded, epoxy-molded case with cathode band marking for unidirectional polarity. Leads are pure tin-plated, solderable per J-STD-002, and meet UL 94V-0 flammability rating.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar transient suppression applications.

Compared with P6KE27A, SMAJ28A offers surface-mount convenience but sacrifices 200 W surge headroom and has higher clamping voltage, while 1.5KE27A delivers triple the peak power rating in the same through-hole footprint - enabling reuse of existing PCB layouts with enhanced robustness.

Availability

P6KE27A is available at Aetrix Electronics and suitable for automotive electronics, industrial PLCs, LED lighting systems, and medical auxiliary power supplies requiring stable component supply and AEC-Q101-compliant surge protection.

Supply support for P6KE27A includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in power management, protection, and signal conditioning components.

The P6KE series belongs to TSC's high-reliability TVS diode product line, engineered specifically for automotive and industrial environments where sustained thermal performance, surge immunity, and long-term parametric stability are critical.

FAQ

What is the breakdown voltage tolerance of P6KE27A?

The P6KE27A has a specified breakdown voltage range of 25.7 V to 28.4 V at 1 mA test current, representing ±5% tolerance around the nominal 27 V rating. This tight V_BR window ensures consistent clamping behavior across production lots and supports predictable system-level overvoltage threshold design. The P6KE27A datasheet confirms this range under standard test conditions (TA = 25°C).

Is P6KE27A suitable for bidirectional transient protection?

No, P6KE27A is a unidirectional TVS diode intended only for DC line protection with defined polarity. For bidirectional applications such as AC lines or data buses, the P6KE27CA variant must be used. The P6KE27A cathode band marking and electrical specifications apply exclusively to unidirectional operation - using it in reverse-biased AC configurations risks premature failure or inadequate clamping.

Does P6KE27A meet automotive qualification standards?

Yes, P6KE27A is AEC-Q101 qualified, having passed stress tests including high-temperature operating life, temperature cycling, and ESD per JESD22 standards. This qualification applies to the standard P6KE27A variant per Taiwan Semiconductor's ordering code documentation, confirming suitability for automotive body electronics, lighting, and infotainment subsystems where reliability under thermal and mechanical stress is mandatory.

What is the maximum clamping voltage of P6KE27A under surge conditions?

The maximum clamping voltage of P6KE27A is 37.5 V at 16.8 A peak pulse current (I_PP) under the standard 10/1000 µs double-exponential surge waveform. This value is measured per ANSI/IEEE C62.35 and represents the upper limit of voltage seen by downstream circuitry during worst-case transient events - critical for ensuring protected ICs remain within their absolute maximum voltage ratings.

Can P6KE27A replace P6KE27 in an existing design?

Yes, P6KE27A is the tighter-tolerance version of P6KE27, with a narrower breakdown range (25.7–28.4 V vs. 24.3–29.7 V) and slightly higher V_WM (23.1 V vs. 21.8 V). The P6KE27A maintains identical package, pinout, and surge rating, making it a direct drop-in replacement that improves voltage threshold consistency without layout or bill-of-material changes.